Max mayer



2 Sheets-Sheet 1.

(No Model.)

M. MAYER. DYNAMO ELECTRIC MACHINE OR MOTOR. No. 437,160.

Patented Sept. 23, 1890.

WIT E E emfif iei Kw 60th (No Model.) 2 Sheets-Sheet 2.

M. MAYER. DYNAMO ELECTRIC MACHINE 0R MOTOR No. 437,160. Patented Sept. 23, 1890.

waif/2 4 W/W m mam run: 90., mvcrumu, vuwwwwn n c UNITED STATES PATENT .OFFICE.

MAX MAYER, ()F NElV YORK, N. Y., ASSIGNOR TO DAVID IIIRSOI'I, OF SAME PLACE.

DYNAMO-ELECTRIC MACHINE OR MOTOR.

SPECIFICATION forming part of Letters Patent No. 437,160, dated September 23, 1890.

To all whom, it may concern.-

Be it known that 1, MAX MAYER, a citizen of the United States, and a resident of New York, county and State of New York, have inyented certain new and useful Improvements n Dynamos or Motors, of which the following 18 a specification.

My invention relates to an electric motor or dynamo, and especially to the details of mechanical construction of a small type of motor.

The object of the invention is principally cheapness of manufacture, and, secondly, light weight as compared to size.

lhe lnvention 1n all its details is set forth 1n the accompanying drawings, in which Figure 1 is a front elevation of the complete machine, except that the armaturecoils are omitted. Fig. 2 is a side elevation showing the motor equipped with a ventilating blower or fan. Fig. 3 is a plan view of the machine, the fan with a portion of its shaft being removed. In Figs. 2 and 3 the commutator-brushes are omitted. Fig. 4 is a View of a plate or sheet of iron. The dotted lines indicate the outline of the cutting-edge of the stamping-machine, whereby with one stamping process the laminated disks of the armature and laminated plates of the field-magnet are produced one at a time.

The machine consists of the combination of a baseplate constructed in two parts a and b, which when placed together form a rectangular frame, laminated field-magnet plates 0, clamped together by bolts (1, d, and d, the bolts (2 passing through the said frame and the lower ends of the said laminated plates in such a direction as to clamp together rigidly the base-plates a and b and the laminated plates 0, thin layers of insulation 6 between the parts a and b and the laminated plates 0, extensions (Z' to the bolts d which pass through the laminated plates in that horizontal plane which includes the axis of the armature, cross-bars f and f, connecting opposite ends of the extensions 0 and provided with bearings g and g which surround and carry the armature-shaft 7i, an armature e, mounted upon said shaft and consisting of laminated plates 2 and a suitable fanj, mount- Applioation filed June 12, 1890. Serial No. 355,152. (No model.)

ed upon the shaft 7L. Each plate of the fieldmagnet consists of a lower rectangular por-' tion 0', (see Fig. 4,) uprights 0 upon each end of said rectangular portion, a curved piece 0, connecting the upper ends of said uprights, and a central projection 0, projecting upward and parallel to the uprights c", leaving spaces on between itself and said uprights. The upper end of the projection 0 is curved downward, while the middle portion of the cross-piece c is curved upward. These curves are indicated, respectively, by a and n, and between them is located the armature-disk i. In the center of each disk of the armature is a hole for the passage of the armature-shaft. Holes are also provided in the field-magnet plates for the bolts (1 d d. In both cases suitable insulation is provided between the laminae. Projections o are provided upon the sides of the base-plates a and b, and are provided with vertical surfaces, against which press nuts p upon the bolts 6 Upon the central extension 0'' are mounted two coils or magnets q. The length of each coil is less than the distance between the cross-piece c and the uprights 0", so that the spools q, upon which the coils are wound, maybe placed and removed by lifting them upward and out of the space mentioned. The spools maybe wound before they are placed in the machine. The metal immediately around the curves at and a form the respective poles of the dynamo or motor. The armature-shaft 7i, being on the upper part of the motor, leaves plenty of room for the rotation of the fan j without touching a table upon which the motor rests.

By having a cutting-edge whose outlines coincide with the dotted lines in Fig. at an armature-disk and field-magnet plate maybe simultaneousl y stamped from the same sheet of metal 0".

I claim as my invention A dynamo or electric motor consisting of base-plate in two parts a and b, which when placed together form a rectangular frame, laminated iron plates whose lower ends are located in said frame and bolted thereto and to each other, each plate consisting of uprights 0, connected at their upper ends by cross-pieces c', and provided with central In testimony that I claim the foregoing as projections 0 magnets q, located on said my invention I have signed my name, in presprojections, the length of each magnet being ence of two witnesses, this 9th day of J nne, less than the distance between the cross-pieces 1890.

5 0 and the projections 0", extensions d of bolts (1, which pass through the field-mag- MAX MAYER. net plates 0, and cross-bars f and f, connecting said extensions and carrying an arlnatn re- Witnesses:

shaft, of which the armature is located be- EDWARD P. THOMPSON,

IO tween the projections 0 and cross-pieces 0'. E. G. DUVALL, J1. 

